I have no doubt that will be the perception. But I don't think it is the reality at all. Look at the "Top 3 football schools" from each division:
Over the last 10 years Wisconsin, Iowa and Nebraska have a combined winning percentage of .65.
OSU, Michigan and Penn State have a combined winning percentage of .69.
But even this slight advantage to the East is 100% becuase of the Buckeyes, who have been .80. If you were to reduce their winning percentage to the same as the next most successful (Wisconsin... not Michigan), then the Top 3 in the East would be only .54, which would be substantially worse than the Top 3 in the Central.
Well thats also because Michigan has had a few historically bad years under DickRod. I would not count on that continuing very long. Michigan is a helmet school and historically has been a power. I would expect them to rebound in a big way in not too long. Maybe not with DickRod at the helm but you can count on them being a national power at some point soon. Look at the winning percentages over the last 30 years and get back to me (10 years is too small of a sample). Add ND to the mix and its even worse.